i have a 2004R tranny that i got from
www.fbperformance.com it's a bolt in deal no need to shorten the driveshaft you just move the tranny crossmember back to the holes for the th400 mount position, yes you can still use the original speedo cable, you can use the original shift linkage altho i went to a lokar floor shift and a tilt steering column it's a very easy bolt in deal the only thing a little tricky is the tv cable adjustment. i definately suggest that if you"re going to go thru the hassel of changing the tranny over you go for a freash performance build up , i've got 35K miles on mine not a problem